Comparison

Mellow vs DoubleFeel

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Mellow

This health tracker analyzes your body data, including HRV, sleep quality, and heart rate, to provide insights into your physical condition. It offers personalized recommendations for relaxation and features dynamic watch faces that reflect your health status.

Highlights
  • HRV monitoring
  • Sleep quality tracking
  • Heart rate tracking
  • Step count
  • Wrist temperature monitoring
  • Sun exposure tracking
  • Personalized relaxation recommendations
  • Dynamic smartwatch faces
Features
Read full description

Mellow is a health tracker that analyzes your body data to help you understand your physical condition better and achieve a healthier lifestyle. Mellow analyzes your body by monitoring HRV (Heart Rate Variability), and also tracks metrics like sleep quality, heart rate, step count, wrist temperature, and sun exposure time. It visualizes these changes in charts and provides personalized recommendations to help you relax. Additionally, we've designed cute and stylish watch faces for smartwatch users. These faces change dynamically based on your physical state to remind you of your health—come experience it now! Privacy Policy:https://mellow.kelefanli.com/en_privacyPolicyIos User Agreement:https://mellow.kelefanli.com/en_userAgreementIos Member Agreement:https://mellow.kelefanli.com/en_monthly

About

DoubleFeel

Monitor your emotional stress levels and sleep quality with AI-generated insights. Share your health journey with friends and family, encouraging mutual support and well-being through activity challenges and shared progress.

Highlights
  • HRV stress monitoring
  • AI-generated health advice
  • Sleep quality analysis
  • Activity tracking (steps, exercise)
  • Social health sharing with 'Feel buddies'
  • Activity challenges
Features
Read full description

#Editor’s Choice Recommendation #Built by a Team of Leading Experts #Professional Mood Monitoring & Health Data Sharing App DoubleFeel is one of the must-have apps for your Apple Watch. It helps you track HRV, mood and stress, steps, activity, sleep, and more, while using AI to generate professional guidance and insights. You can also stay updated on the health status of family and friends, compete in fitness challenges, and support each other both mentally and physically as you become better together. ***What can DoubleFeel do? When work gets overwhelming and you have been busy all day, DoubleFeel can use HRV data from your Apple Watch to remind you that your stress level is too high and suggest taking a short break, having a snack, or getting up and moving around. When a connected friend is in a great mood, DoubleFeel can let you know that your mood-sharing partner is feeling good and encourage you to ask what made their day. When you struggle to get out of bed in the morning, have dark circles under your eyes, and feel exhausted, DoubleFeel can tell you that your deep sleep ratio was too low last night. Your body may not have recovered well, so creating a quieter and more comfortable sleeping environment may help. Good sleep is one of the best ways to restore your energy and mood. On a day off, when you are relaxing on a soft sofa with nothing urgent to do, DoubleFeel can tell you that you are in a great state and full of energy. Keep up the good mood and enjoy the benefits of a more relaxed lifestyle. If your connected friend has already walked 8,000 steps today while you are still lying in bed, DoubleFeel can remind you to get moving and not fall too far behind. ***Privacy & Security Personal health information is sensitive private data. DoubleFeel reads and writes data directly on your device through the Apple HealthKit API. Your health data values are stored locally on your device or on other devices where you have actively enabled iCloud synchronization. We do not store or access your private health data. Your Feel partner can only view your health metrics after you explicitly agree to connect and share data. ***Health Advice Disclaimer All information and suggestions provided by DoubleFeel are for reference only and must not be considered medical advice or diagnosis. They are not a substitute for professional diagnosis or treatment. If you experience significant emotional changes that you are unable to manage, please seek help from a qualified healthcare professional. ***Terms of Service https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ ***DoubleFeel User Agreement https://cdn1.didiapp.com/linkly/protocol/DoubleFeel%E7%94%A8%E6%88%B7%E5%8D%8F%E8%AE%AE.html ***DoubleFeel Membership Service Agreement https://cdn1.didiapp.com/linkly/protocol/DoubleFeel-huiyuanfuwuxieyi.html ***DoubleFeel Privacy Policy https://cdn1.didiapp.com/linkly/protocol/DoubleFeel-yinsixieyi.html ***DoubleFeel Auto-Renewal Agreement https://cdn1.didiapp.com/linkly/protocol/DoubleFeel%E8%87%AA%E5%8A%A8%E7%BB%AD%E8%B4%B9%E6%9C%8D%E5%8A%A1%E5%8D%8F%E8%AE%AE.html

Screenshots

Mellow4 screens
DoubleFeel4 screens

Verdict

The call

The clearest difference is rating: DoubleFeel at 4.8 against Mellow's 4.0. DoubleFeel also leads on review sentiment (44% vs 32%) and ratings volume (14 vs 4). On price, update cadence, ads and in-app purchases there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Mellow sells 24 in-app purchases, starting at $0.99 per 7 days and DoubleFeel sells 11 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

DoubleFeel holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 4 and 14 respectively. Written reviews point the same way: 32% of Mellow's written reviews are positive against 44% of DoubleFeel's.

UpkeepUpdate frequency

Mellow ships an update fortnightly, DoubleFeel every 9 days. Both last shipped on September 23, 2026.

Scorecard3 real differences · 7 level
Mellow versus DoubleFeel: the parameters behind the verdict, then further details
ParameterMellowDoubleFeel
PriceFreeFree
Rating4.0 (4 ratings)4.8 (14 ratings) — better
Positive reviews31.8% of reviews44.0% of reviews — better
Number of ratings414 — better
Update frequencyFortnightlyEvery 9 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, Apple WatchiPhone, Apple Watch
Requires iOS16.0 — better17
Further details — not scored
Size191 MB49 MB
Age rating17+17+
DeveloperChongqing Zhipingou Technology Co., Ltd.Wuhan DiDi Technology Co.,Ltd.

Customer experience

Mellow

All ratings4 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews22 reviews
Positive31.8%
Neutral0.0%
Negative68.2%

DoubleFeel

All ratings14 ratings
Positive92.9%
Neutral7.1%
Negative0.0%
Written reviews50 reviews
Positive44.0%
Neutral6.0%
Negative50.0%

In-app purchases

24 purchases

Mellow

Subscriptions16
  • One-week Membership7 Days trial$0.997 Days
  • 月会员$1.991 Month
  • Monthly Membership$2.991 Month
Show 13 more
  • Monthly Membership1 Month trial$4.991 Month
  • Monthly Membership$4.991 Month
  • 一个月会员$4.991 Month
  • Monthly Membership$6.991 Month
  • 周会员-首周优惠7 Days trial$6.997 Days
  • Annual Membership$9.991 Year
  • Monthly Membership3 Days trial$9.991 Month
  • 年会员-7天免费试用7 Days trial$9.991 Year
  • 一年会员$9.991 Year
  • Monthly Membership2 variants$12.991 Month
  • Annual Membership$12.991 Year
  • Annual Membership2 variants$29.991 Year
  • Annual membership$39.991 Year
One-time8
  • 季度会员$4.99
  • 一年会员$7.99
  • 永久会员$9.99
Show 5 more
  • Lifetime Membership$12.99
  • 永久会员$14.99
  • Permanent Member$22.99
  • Lifetime Membership$68.00
  • Lifetime Membership$129.99
11 purchases

DoubleFeel

Subscriptions7
  • 连续包月$2.991 Month
  • Weekly$6.997 Days
  • 连续包季$6.993 Months
Show 4 more
  • Monthly$12.991 Month
  • 单人连续包年$12.991 Year
  • Yearly$20.991 Year
  • 双人连续包年$22.991 Year
One-time4
  • 双人永久会员(单人版升级)$12.99
  • 单人永久会员$14.99
  • Lifetime$29.99
Show 1 more
  • 双人永久会员$29.99

Questions

Is Mellow free?
Mellow is free to download, with in-app purchases available.
Is DoubleFeel free?
DoubleFeel is free to download, with in-app purchases available.
Which has better reviews, Mellow or DoubleFeel?
DoubleFeel is rated higher. Mellow averages 4.0 out of 5 from 4 ratings, while DoubleFeel averages 4.8 from 14 ratings.
Do Mellow or DoubleFeel have ads?
Neither Mellow nor DoubleFeel shows ads.
Which is updated more often, Mellow or DoubleFeel?
Mellow ships an update fortnightly, and DoubleFeel every 9 days. Most recently, Mellow was updated on September 23, 2026 and DoubleFeel on September 23, 2026.

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